<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" />
    <label for="toggle-all"></label>
    <input
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
      @keyup.enter="butKeyup"
      v-model.trim="name"
    />
  </header>
</template>

<script>
export default {
  data () {
    return {
      name: ''
    }
  },

  methods: {
    butKeyup () {
      if (this.name === '') return alert('请输入任务名称！')
      this.$emit('on-add', this.name)
      this.name = ''
    }
  }
}
</script>
